250 
A number of specimens of crown-gall donated by the New 
Jersey Agricultural Experiment Station have recently been added 
to the museum. Within the last few years it has been con- 
clusively proven that this disease i is out by neal tume- 
4en 
Town-gali is of popular 
approach in the vegetable kingdom to the cancer of the human 
body. The disease ea causes swellings of various kinds is 
sometimes kno “-vegetabl ncer.”” The specimens are 
temporarily aeailel with ae fungous ilbetons. 
Last summer, Dr. F. W. Pennell, of the Garden staff, spent 
three months in the Rocky Mountains collecting in Colorado, 
southern ming, northern er eastern Idaho the 
Yellowstone National Park. pecially interested in 
plants ewer Foran (Seopa He brought 
out 790 numbers, 
ieee: about 3,500 specimens h Dr. Pennell is just 
belli n work is finished the principal 
e whic ie 
Pennell has been assigned to prepare for the North American 
Flora 
Professor F. W. Clarke, chief chemist of the United States 
Geological Survey, visited the Garden on November 18 to obtain 
1 
ee es of calcareous marine algae for chemical analysis. As 
one the manifestations of the increasing recognition i the 
tee importance of ‘the algae in the formation of lime- 
stones, the United States Geological Survey is n r 
series of chemical investigations of the inorganic eee 
of living and fossil corals, calcareous algae, and other lime- 
secreting organisms. 
Meteorology for November—The total precipitation for the 
onth was 1.16 inches. The maximum temperatures for each 
31° on the 11th, 23° on the 18th, and 20° on the 23d 
